Detailed Test Plan and Results with Obtained Feedback
Detailed Test Plan
The tests requiring hard measurements will be performed by the team. Some of the tests require user feedback and the corresponding results will be determined based on feedback analysis.
- Windows PC with Microsoft PowerPoint 2003 or later found on a laptop provided by the team
- Digital Scale obtained from the Aero Club
- PC-Connected Projector obtained from Mark Smith
- Projector Screen found in Erdle Commons in Building 09
- Calipers provided by Mason
- Digital Multimeter found on the 3rd floor in one of the Electrical Engineering Labs
- PC Stopwatch Program on Mason's iPhone
- 3DSSPP Software found in the ISE Computer Labs
1. Device will be under 0.5 pound(s). The complete device (including the band) will be weighted on a digital scale with .01 accuracy. The device must weigh less than 0.5 lb.
2. Device will allow full range of natural motion, including excessive hand motion and roaming the presentation area. (No wires or restrictive components) Based on user feedback.
3. Maximum Size will be less than 24 cubic inches. The casing from the device will be measured by calipers in length, width, and height. The volume of the device has be less than 24 cubic inches. (excluding the band)
4. Device can sustain multiple drops from waist height (~3ft) onto carpeted surface. There will be 3 steps to passing this criteria. First the device will be tested on a computer to show that it is working. Second the device will be dropped 10 times from 3ft on the carpeted floor in Erdle Commons. The device will be released from the hand to replicate accidental drop. Third, the device must work after the 10 drops and will be verified by testing it on a computer.
5. Device will allow ASL to be utilized without major interference. Based on user feedback.
6. Device will not progress to next slide, or return to previous slide, without intentional activation. Based on user feedback.
7. Device will work within a range of minimum of 40 feet from PC without problem. A computer will be place 30ft away from the device. The device must be able to flawlessly scroll a 20 slide presentation to the end and then back.
8. Device will be implemented for minimum cost. The cost of the project will be less then the allowed budget of $750.
9. Battery life will exceed 4 hours of continual usage. Put in a new battery. Set up a laptop. Press the up button and leave it on for four hours. The remote must work after four hours. Pass/Fail
10. Latency between button push and slide change will be less than 0.75s Create a powerpoint with 100 numbered slides. Starting at slide #1, the tester will press the “next slide" button as rapidly as possible. After 60 seconds, the user must reach at least slide #80. By surpassing slide #80 in 60 seconds, the tester will have achieved an average slide change time of .75 seconds or less.
11. Device successfully advances to next and previous slides. The wristband will be used to flip 20 slides to the end and then back at 10 ft away without any trouble. This test will be covered by test 7.
12. The device will be safe to use for as wide of the population as possible. A model will be created in the 3DSSPP software to show that the device does not pose any dangers to joints and muscles.
As can be observed, the device met or exceeded all specified requirements.
A model was drawn up in 3DSSPP to determine the population capability for safely wearing the device. A 5th percentile female was used as a test subject to represent physically weakest population. Due to the limitations of the software, it was assumed that the device was held in the hand, which would create a stronger force then normally when the device would be worn on the wrist. Because the device itself only weighs 0.126 lbs, the forces applied on the body are minimal and as can be seen the image below, the test subject is on average 99% capable, which means that the device is safe to use for everyone else.
The picture above shows a table of average scores which were calculated from survey results. The table displays scores from five major categories: aesthetics, comfort, fit function, and an overall rating score. The results are about what the team anticipated.
The aesthetics and comfort scores are a little bit low which was found to be acceptable. It was found to be desirable that the device should be made smaller. This comment was foreseen by the team, but with the limited materials, tools, and above all, a strict time constraint, this was simply not achievable. However, if this device was moved to the mass production stage and the case was to be injection molded, overall size could be reduced. For more information on the new case proposal please refer to the proceeding Recommendations & Future Work section.
The average scores from the comfort and fit section provided positive feedback. As far as a slightly low score from comfort, most of the point deduction occurred because of the large device size combined with the fact that most people weren’t used to wearing a device on their wrist when presenting. The scores for fit returned favorably in terms of a one-size-fits-all approach and keeping the device in place while the user was presenting.
The device functionality was the highlight of the survey results. The device performed well in its main goal of changing the Power Point slides forward and backward as well as preventing false triggering of slides. Additionally, survey results indicate that this device was rather easy to use. The main complaint about function was the pressing of the buttons. Some people thought the buttons were too small, others thought they were too hard to press, some people thought they were perfectly fine. What this boils down to is a matter of personal opinion. If the user’s has large fingers, the buttons might feel small. If the user has small hands, the buttons may seem hard to press. However, none of the survey takers scored the button pressing low enough to require any major changes.
The overall score of this project is a good indicator of project completion as well as customer interest. The higher score indicates that project goals in terms of fit, performance, and that the product we created would be viable if marketed for public consumption, were met. Additionally, users set an average price that was within the target price range that the team had designed the product to fall within.